Home / 21,586.86-29,790.45-12,155.76

Finding the Fourth Proportional to 21,586.86, 29,790.45 and 12,155.76

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Solution

The fourth proportional to 21,586.86, 29,790.45 and 12,155.76 is: 16,775.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,586.86 : 29,790.45 = 12,155.76 : x
  2. Step 2: Convert to fraction form
    21,586.86/29,790.45 = 12,155.76/x
  3. Step 3: Cross multiply
    21,586.86x = 29,790.45 × 12,155.76
  4. Step 4: Simplify right side
    21,586.86x = 362,125,560.49
  5. Step 5: Solve for x
    x = 362,125,560.49/21,586.86
  6. Step 6: Final answer
    x = 16,775.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.